Question

8. Which of the following statements defines most accurately the exogenous fluorophores used in photodynamic therapy?

a) these compounds are medicine

b) these compounds emit in the UV when exposed with shorter wavelength sources

c) these compounds have electronic levels and the visible light they emit is controlled by the energy difference between electronic levels

d) these compounds are designed with electronic bands and the visible light they emit is controlled by the enrgy gap separating the bands

e) these compounds are designed with electronic bands and the UV light they emit is controlled by the enrgy gap separating the bands

Answer 1

Answer :

(b) these compounds emit in the UV when exposed with shorter wavelength sources.

The fluorophore absorbs light energy of a specific wavelength and re-emits light at a longer wavelength.